Piano-stool.



F. H. MEYER.

PIANO STOOL.

APPLIGATION FILED P11020, 1908.

Patented-Nov. 10,1908.

2 SHEETS-SHEET Z.

"WWK/WS;

Q0. MMM

FREDERICK H. MEYER, OF CHICAGO, ILLINOIS.

PIANO-sroon Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed February 2B, 1908. Serial No. L118,175.

To all whom it 'may concer/n:

Be it known that l, FREDERICK H. MEYER, a citizen of the United States, residing at Chicago, county of Cook, and State of lllinois, have invented certain new and useful Improvements in Piano-Stools, of which the following is a specification.

My invention relates to piano stools, and the object of my invention is to provide a piano stool, the seat of which may be readily and quickly adjusted to any height without turning the same as is now generally necessary with stools of this class now in the market.

A further object of my invention is to provide a piano stool having a vertically adjustable seat as mentioned, and so arranged that the seat shall be free to rotate, and that without varying the height thereof.

A. further object of my invention is to provide a piano stool as mentioned in which the seat may be adjusted while occupied.

Other objects will appear hereinafter.

My invention will be more readily understood by reference to the accompanying drawings, forming a part of this specification, and in which,

Figure 1 is a vertical section of a piano stool embodying my invention in its preferred form, Fig. 2 is a horizontal section on the line m-m of Fig. 1, looking` upwardly, Fig. 3 is a horizontal section on the line g/-y of Fig. 1, looking downwardly, Fig. 4; is a similar section on the line 2 2 of Fig. 1, upon an enlarged scale, Fig. 5 is a detailed view upon an enlarged scale, of the locking device, the same being shown in unlocked condition, and Fig. 6 is a bottom plan view of the same, illustrating the parts in locked condition.

Referring to the drawings 1 indicates the seat of a piano stool and 2 the base, the latter comprising the top plate or disk 3, the legs at, and the vertically disposed central member or post 5. The plate 3 is supported by the legs 4f, and the member 5 depends therefrom in the usual manner, the member 5 and the legs 4t being connected by the usual braces G. Arranged concentrically within the base, that is within the member 5 is a vertically disposed tubular member 7 which is secured at its upper end to a plate '8 resting upon the disk or plate 3, the plate 8 being provided with a depending annular flange 9 into which the end of the member 7 is threaded.

Fixed to the under face of the seat 1 is a metal plate 10 having a central depending cylindrical lug 11 by means of which it is rotatably mounted upon a plate or disk 12.

13 indicates a pin for securing the plate 12 on the lug 11, and 14 a washer interposed between the pin and the plate. Fixed to the plate 12 and depending therefrom is a tubular member 15 which telescopes within the member 7. rlhe upper end of the member 15 is threaded into a depending annular ange 1G formed upon the underface of the plate 12. It will be seen that the seat 1 is thus rotatably mounted upon the depending tubular member 15. For reasons which will appear hereinafter, 1 prefer that the member 15 be rotatably fixed with relation to the base, and to this end provide the member 15 with a pair of longitudinal slots 17 diametrically opposite from each other and extend therethrough a horizontal bar 1S which is secured to the plate 8. The ends of the slots, 19 and 20 by engaging with the bar 1S, limit the downward or upward movement of the member 15 within the member 7.

To lock the seat at the desired height the member 7 is internally notched or threaded and the member 15 is provided with a pair of dogs or latches to engage therewith, suitable means being provided for throwing said dogs into or out of engagement with said notches or threads as desired. ln the drawings 1 have'illustrated the member 7 as internally threaded as at 21, the threads being continuous. However it is obvious that it is not necessary that the threads be continuous inasmuch as the cylindrical members 7 and 15 are locked against relative rotation.

22-22 indicate the dogs pivotally mounted as at 23 and provided with the notched portions 24 to engage the threads 21. The dogs are pivotally mounted between the ears 25 formed on the lower end of the tube 15. The ears are formed by cutting the tube 15 with the horizontal kerfs 2G, cutting away a small intermediate portion of the wall between the ends of the ears and then bending the ends thus formed inwardly, and parallel with each other as shown in Fig. G.

27 indicates a vertical rod arranged within the tubular members 7 and 15 and having the bifurcated upper and lower ends 28 and 29 respectively. The lower end of the rod is connected to the dogs 22 by a pair of links 30. The inner ends of the links 30 are shouldered as at 31 and are pivotally mounted between the lugs of the bifurcated end 29, upon the cotter pin 32. When the rod 27 is in raised position the links 30 are horizontal, throwing the dogs into engagement with the threads 21 and when the rod is lowered or depressed the links 30 withdraw the dogs from engagement with said threads. Y

33 indicates a lever for operating the rod 27. The lever is pivoted as at 34 upon a bracket 35 secured to the plate 12, and extends through a slot 36 in the tubular member 15, the inner end being connected as at 37 to the upper end 28 oi' the rod.

38 Y indicates a transverse bar secured within the member 15 and between which and the shoulder 39 at the upper end of the rod is interposed a spring` 40. The bar 38 is enlarged as at 41 forming a seat for the spring and the rod 27 passes through a central aperture 42 formed therein. The spring maintains the rod 27 in raised position, locking the seat against vertical movement except when manually depressed by the lever 33.

43 indicates a spring having its upper end connected to the bar 18 andV its lower end connected to a pin 44 arranged between one pair of ears 25. The spring 43 is normally under tension, hence when the dogs are released it tends to raise the seat, offering yielding resistance to the weight of the occupant.

In using the device the occupant of the stool raises the outer end 45 of the lever, which extends substantially to the edge of the seat, rthereby releasing the locking dogs. He then varies his weight upon the seat, causing it to move upwardly or downwardly with or against the tension of the spring 43 as desired. When the desired height is obtained the lever is released and the spring 40 raises the rod 27 throwing the dogs into locking position, the lug 11 acting as a stop to limit the upward movement of the rod. It should be noted that the rod 27 passesthrough an aperture 18 in the bar 18 vthe bar thus serving as a guide for the rod.

Having described my invention what I claim as new and desire to secure by Letters Patent is: l Y

l. A piano stool comprising the seat and base portions in combination with a pair of telescoping tubular members secured to said seat and said base respectively, the member which is secured to the seat being longitudinally slotted, a bar extending horizontally through said slots and forming with the ends thereof means for limiting the vertical movement of said member, a pin extending transversely through the lower end of said member, a spring connected at its upper end to said bar and at its lower end to said pin 1 and means for locking said member in the desired position with relation to said base substantially as described. Y

2. A piano stool'comprising the seat and base portions in combination with a pair of telescoping tubular members secured to said seat and base respectively, the member which is secured to said seat being longitudinally slotted, a bar extending horizontally through said slots and forming with the ends thereof p j means for limiting the vertical movement of said member, a pair of dogs pivotally connected to the lower end of said member, the inner face of the other member being notched or serrated to be engaged by said dogs, a vertically disposed rod arranged within said tubular members, and arranged for vertical reciprocation therein, a pair of links connecting the lower end of said rod with said dogs, a lever pivotallymounted. 

